Samuel j



s. J. GOODWIN.

Paint Mill. N0. 63,502. Patented April 2, 1867.

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SAMUEL J. GooDWI'N, or noonron, tLLiNots.

Letters Patent 1V0. 63,502, dated April 2, 1867.

IMPROVEMENT IN PAINT-MILLS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, SAMUEL J. GOODWIN, of Rockton, Winnebago county, inthe State of Illinois, have invented a new and useful ImprovementinMills for Grinding. Paint; and I do'herehy declare that the following isa full and exact description thereof, which will enable any one skilledin the art to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereonand making a part of this specification, in which Figure 1 is a sideelevation of the mill complete Figure 2i, a top view of the lowergrinding plate 33, sections of the frame Di D, and spring-scraper 0.

Similar letters of reference indicate like parts in each of the saidfigures 1 and 2.

D D represent the frame, E the bevel-gear shaft with crank b, thebevel-gear shaft resting upon the lever Ii and turning the grindingplate 13 C the springscraper, and A the hopper. This style ofpaint-mills has heretofore been constructed with the outer edge of thegrinding plate 13 left square, so that when run at a high rate of speed,a considerable sheet-like stream of paint would be thrown off bycentrifugal force, causing much waste and annoyance, requiring an apronto be placed around the mill to prevent everything near being spattcredwith paint. But by the use of my invention, bevelling the edge of thegrinding plate B, as shown in fig. 1, thetendency of the paint to flyoil by centrifugal action is entirely broken up, and the stream offinely ground paint adheres to the edge of the plate no matter how highthe speed at which the mill is driven, and the paint is olcanedoif bythe spring-scraper G, and caused to run into the trough conducting tothe reservoir. These mills may be made of any available size, and powercommunicated by belt or gear. I do not claim the arrangement 7 of thehopper, grinding nut, driving and adjusting mechanism, nor do I claimthe scraper, as I am aware that these parts are not new. Thedistinguishing characteristic of my invention consists in constructingthe lower revolving grinding nut with a bevelled or inclined rim, uponwhich the paint is delivered or discharged from between the grindingsurfaces, said nut having been heretofore constructed with an upright orperpendicular rim or discharging surface. I am also aware that a rebateor groove has been formed in the periphery of the lower grinding nut forthe purpose of attaining the same end as that which is accomplished bymy invention, but this means not only differs from mine with respect toconstruction, but is attended with the objection that the rim cannot becleaned withoutgreatinconvenience, whereas my discharging rim can becleaned with facility, by reason of the fact thatthe rim or periphery ofthe grinding nut is perfectly plain and smooth. iwould here state thatinasmuch as the speed of the mills increases in proportion to theirsize, the bevel of the rim should be increased in accordance with thecentrifugal force which is due to the increased size and speed.

Having thus described my invention, what I claim as new herein, anddesire to secure by Letters Patent, is- The revolving grinding nut whenconstructed with a bevelled rim. at its lower portion, substantially asdescribed.

SAMUEL J. GOODWIN.

Witnesses:

D. W. G. CASTLE, J. O. CRONIN.

